from Chapter II of Spatial Analysis of Ecological Factors Related to Grasshopper Population Dynamics in Wyoming
Fig. 16. Spatial distribution of rangeland grasshopper outbreaks during 1978-1979, when the infestation area increased by 331.3% over the previous year (dark shading = uninfested area; yellow = area infested in 1978 only; blue = area infested in 1979 only; green = area infested both years; black = state and county borders).
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